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Possible to overload a pump with too much tubing and just two radiators with one block?

post #1 of 3
Thread Starter 
I have a six watt Laing pump that came with the EK L360 2.0 kit and I added a 480mm external radiator. The loop is:

CPU with the EK-Supremacy MX
EK-CoolStream PE 360 internal
EK-CoolStream PE 480 external
EK-XRES 100 DDC MX 3.1 PWM (Laing DDC 3.1 PWM 6W)
Two EK-Tube ZMT Matte Black 15,9/9,5mm (2 meters) with about a foot removed
EK-ACF Fitting 10/16mm (8 pcs)
One EK-Ekoolant EVO Clear with distilled water (more distilled water percentage than suggested since I needed to add more water)

No GPU is connected. The chipset is air cooled. There is only one block.

I have read that blocks tend to be the thing that reduce flow. One person said tube length is a minimal issue. So I'm wondering why I don't see water moving in my reservoir since I connected the 480, even when the pump is running over 2800 RPM.

I'm getting poor temperature performance which is why I'm asking about this, in addition to not seeing movement in the reservoir anymore. I have the external radiator vertical with the tubes at the top. The 360 is horizontal at the top of the case. There are no evident kinks. The black rubber tubing is very thick and difficult to kink.
post #2 of 3
First to answer your question, that pump should be plenty to push through all those components. Rads are usually more restrictive than blocks, and you have way overkill rad space, but that is not necessarily a bad thing, so I don't think you have a flow problem with your pump. What you probably have is air in the loop somewhere, have you tilted your case side to side and front and back to dislodge any air pockets?

You said you had poor temp performance but you didn't say what your temp was, or any other specs about your rig? Also, do you know the water temp in the loop? Can you throw up a pic of the loop for more clarification?

I will also add that when a loop is running properly you really won't see any flow indication in that res/pump combo, I can't see any in my DCP2.2 combo unless I look really hard at the top of the water line.
 
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post #3 of 3
Thread Starter 
Quote:
Originally Posted by Radnad View Post

First to answer your question, that pump should be plenty to push through all those components. Rads are usually more restrictive than blocks, and you have way overkill rad space, but that is not necessarily a bad thing, so I don't think you have a flow problem with your pump. What you probably have is air in the loop somewhere, have you tilted your case side to side and front and back to dislodge any air pockets?

You said you had poor temp performance but you didn't say what your temp was, or any other specs about your rig? Also, do you know the water temp in the loop? Can you throw up a pic of the loop for more clarification?

I will also add that when a loop is running properly you really won't see any flow indication in that res/pump combo, I can't see any in my DCP2.2 combo unless I look really hard at the top of the water line.
Thanks for the reply.

I haven't done any front to back tilting.

As far as temperatures go I am getting conflicting results. SIV says I am way way high when I Prime, even after a minute. 71C is where I stopped it. HWINFO says lower temps but they're still lousy. I have an AMD 8370E at 4.4 and 1.36V. The programs report 185 watts in max (Power Input) and roughly 150 POUT. I just tested again. HWINFO said my idle was 11.6C and it jumped to 42C within a few seconds. This is with a cold room (probably 60F, maybe 59 -- downstairs says 63 but I've had windows open upstairs and it's 45 outside). Earlier, with higher ambient I jumped from 22C idle to 53 almost instantly, and then went up to 55 within two minutes' time. Then I noticed the temp started dropping, down to 48 before I quit Prime -- without the FFT having changed. It said 100% load but I wondered if throttling was happening.

My temperatures are OK at the moment according to HWINFO (50C in Prime) but the room ambient is low. But, I just opened SIV and it says I'm at 68C. It also gives me a higher idle temp (34C). I can only think it's wrong but the thing that makes me wonder is the way I get throttling above 4.4 GHz with this board in Linpack. The board is the UD3P 2.0 from Gigabyte. It has a 4 phase digital VRM system for the CPU with a doubler. I have plenty of airflow for the VRM and northbridge and even have a fan behind the socket. The other thing that makes me wonder is my BIOS gives me a higher idle temp than HWINFO.

The vardar fans on the 360 are set to low (noisy above low with a strong midrange tonality until high speed where they're loud in terms of white noise) or have little push force (Kingwin 950 or so RPM sleeve fans on the 480 that are just hooked to a molex). However, even with the fans on low and with the weakness of the Kingwins I don't think high temperatures should be happening at just 4.4 GHz and 1.36V. I can feel some air come through the other side of the radiator with the Kingwins, although there is a strong amount of airflow coming the wrong direction from the top of the top fan. I know sleeve fans don't have a good reputation for static pressure, especially basic $4 fans like these. But, I wanted something quiet and cheap. I don't know what the water temperature is. I will take a picture.

The CPU and block are lapped to 3000 grit. I had to do that because the Liquid Pro I was using dried up on the block and I wanted to get rid of the concavity of the CPU. I used EK Ectotherm TIM, larger than a rice grain... the size of a small pea. I figured the lapping should reduce the amount I need.

I have also cleaned the block recently (when I disassembled the loop to add the 480 and do the lapping) and changed the plate from the thin one, which came bent, to the thickest one that they suggested for AMD. I used the thin one originally because the CPU has a large die but I wasn't sure if a bent thin one would have worse performance. Jet plates are not supposed to do a whole lot, though, regardless.
Edited by superstition222 - 1/28/16 at 6:29pm
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